Anterior interosseous Syndrome

Anterior interosseous Syndrome

This condition is caused by a compression or stretching of the anterior interosseous nerve (branch of the median nerve) as it passes between a layer of muscles and anterior part of the elbow complex. According to the Injury classification system, this syndrome usually develops because of a misalignment issue therefore is considered a level 1 injury with associated nerve entrapment. Chronic injuries at the elbow may also narrow the nerve passage due to the scar/fibrotic tissue at the superficial fascia and by the osteophytic bone formation from the underlying bones.

This condition may be misdiagnosed as tennis elbow as per the close anatomical relationship.
This nerve entrapment causes radiating pain on the front side of the elbow with radiation toward the forearm and palm of the hand. The classical sign is the inability to pinch items between the thumb and the index finger because of the neurological compromised to the flexor policis longus and flexor digitorum profundus muscles.

Mechanism of Dysfunction

The main predisposing factor for the development of this condition is a dysfunction misalignment of the elbow complex either creating a direct nerve pressure or by narrowing nerve canal.

Assessment Protocol

The entire upper extremity biomechanical chain must be evaluated as part of the elbow analyses as per the neurological and mechanical influences of the spine, shoulder, and hand.

Clinical assessment of the key elbow joints with specific attention to the evaluation of the entire elbow complex alignment.
Neurological examination

X-ray analysis 

Anterior – Posterior (AP) and Lateral Xray view is essential to check the alignment of the entire possible elbow misalignments that could predisposed to this syndrome

MRI analysis 

Important exam to verify the level of narrowing of the nerve passage and the degree of nerve inflammation and damage.

Treatment protocol

Restore the biomechanical alignment of the entire elbow complex.
Median Neuromobilization techniques may be used once the direct compression of the nerve is reduced.
Specific therapeutic essential oils are applied to reduce nerve inflammation and enhance healing.

Depending on the level of nerve compromised and chronicity of the misalignment a minimum of 6 weeks up to 12 weeks of treatment care may be necessary to resolve this deformity.

Related Conditions